Blockly.defineBlocksWithJsonArray([  // BEGIN JSON EXTRACT
  // Block for colour picker.
  {
    "type": "directive_manage",
    "message0": "Start execution",
	"message1": "do %1",
	"args1": [
	     {"type": "input_statement", "name": "DO"}
	],
  }
]);  // END JSON EXTRACT (Do not delete this comment.)